Map<String, Object> stats = resourceManager.getStatistics();
        assertNotNull(stats);
    }

    @Test
    @DisplayName("Test force cleanup")
    @Timeout(value = 5, unit = TimeUnit.SECONDS)
    void testForceCleanup() {
        TestResource resource1 = new TestResource("cleanup1");
        TestResource resource2 = new TestResource("cleanup2");

        resourceManager.registerResource(resource1);

    $ mvn package     # Build the package

#### 2. Start Fess Server

    $ unzip target/releases/fess-*.zip
    $ ./fess-*/bin/fess &

Wait for Fess to be ready (this may take up to 60 seconds):

    $ curl -s "http://localhost:8080/api/v1/health"

You should see a JSON response when Fess is ready.

#### 3. Clone Test Data

Required for SearchApiTests:

    }

    /**
     * Returns the second value.
     *
     * @return The second value
     */
    public T2 getSecond() {
        return second;
    }

    /**
     * Sets the second value.
     *
     * @param second
     *            The second value
     */
    public void setSecond(final T2 second) {
        this.second = second;
    }

    @Override

        });
        th.start();

        final CountDownLatch latch = new CountDownLatch(1);
        deferred.promise().then(response -> latch.countDown());
        assertTrue(latch.await(10, TimeUnit.SECONDS));
    }

    @Test
    public void test_doneAfterResolve() throws Exception {
        final Deferred<SuggestResponse> deferred = new Deferred<>();

        Thread th = new Thread(() -> {

        this.value1 = value1;
    }

    /**
     * Returns the second value.
     *
     * @return The second value
     */
    public T2 getValue2() {
        return value2;
    }

    /**
     * Sets the second value.
     *
     * @param value2
     *            The second value
     */
    public void setValue2(final T2 value2) {
        this.value2 = value2;

        this.value1 = value1;
    }

    /**
     * Returns the second value.
     *
     * @return The second value
     */
    public T2 getValue2() {
        return value2;
    }

    /**
     * Sets the second value.
     *
     * @param value2
     *            The second value
     */
    public void setValue2(final T2 value2) {
        this.value2 = value2;

    void testJoinWithStringBuilder() {
        StringBuilder sb1 = new StringBuilder("first");
        StringBuilder sb2 = new StringBuilder("second");
        String result = StringUtil.join(",", sb1, sb2);
        assertEquals("first,second", result);
    }

    @Test
    @DisplayName("Should handle StringBuffer as CharSequence")
    void testJoinWithStringBuffer() {

        ChannelInfo second = loadBalancer.selectChannel(mockMessage);

        assertNotNull(first);
        assertNotNull(second);
        // Due to round-robin, should get different channels or same order
        assertTrue(Arrays.asList(channel1, channel2).contains(first));
        assertTrue(Arrays.asList(channel1, channel2).contains(second));
    }

    @Test

    /**
     * Cache for exclude filters.
     */
    protected LoadingCache<String, List<Pattern>> excludeFilterCache;

    /**
     * The expiration time for the filter cache in seconds.
     */
    protected int filterCacheExpireAfterWrite = 10; // 10sec

    /**
     * The maximum number of items to load into the cache.
     */
    protected int maxLoadSize = 10000;

    /**

        this.value1 = value1;
    }

    /**
     * Returns the second value.
     *
     * @return The second value
     */
    public T2 getValue2() {
        return value2;
    }

    /**
     * Sets the second value.
     *
     * @param value2
     *            The second value
     */
    public void setValue2(final T2 value2) {
        this.value2 = value2;